/*
 * Copyright 2012 - 2013 Benjamin Weiss
 * Copyright 2012 Neofonie Mobile GmbH
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package de.keyboardsurfer.android.widget.crouton;

import android.view.animation.Animation;
import android.view.animation.TranslateAnimation;

/**
 * Builds the default animations for showing and hiding a {@link Crouton}.
 */
final class DefaultAnimationsBuilder {
	private static Animation slideInDownAnimation, slideOutUpAnimation;

	protected static final class SlideInDownAnimationParameters {
		private SlideInDownAnimationParameters() {
			/* no-op */
		}

		public static final float FROM_X_DELTA = 0;
		public static final float TO_X_DELTA = 0;
		public static final float FROM_Y_DELTA = -50;
		public static final float TO_Y_DELTA = 0;

		public static final long DURATION = 400;
	}

	protected static final class SlideOutUpAnimationParameters {
		private SlideOutUpAnimationParameters() {
			/* no-op */
		}

		public static final float FROM_X_DELTA = 0;
		public static final float TO_X_DELTA = 0;
		public static final float FROM_Y_DELTA = 0;
		public static final float TO_Y_DELTA = -50;

		public static final long DURATION = 400;
	}

	private DefaultAnimationsBuilder() {
		/* no-op */
	}

	/**
	 * @return The default Animation for a showing {@link Crouton}.
	 */
	public static Animation buildDefaultSlideInDownAnimation() {
		if (null == slideInDownAnimation) {
			slideInDownAnimation = new TranslateAnimation(
					SlideInDownAnimationParameters.FROM_X_DELTA,
					SlideInDownAnimationParameters.TO_X_DELTA,
					SlideInDownAnimationParameters.FROM_Y_DELTA,
					SlideInDownAnimationParameters.TO_Y_DELTA);
			slideInDownAnimation
					.setDuration(SlideInDownAnimationParameters.DURATION);
		}

		return slideInDownAnimation;
	}

	/**
	 * @return The default Animation for a hiding {@link Crouton}.
	 */
	public static Animation buildDefaultSlideOutUpAnimation() {
		if (null == slideOutUpAnimation) {
			slideOutUpAnimation = new TranslateAnimation(
					SlideOutUpAnimationParameters.FROM_X_DELTA,
					SlideOutUpAnimationParameters.TO_X_DELTA,
					SlideOutUpAnimationParameters.FROM_Y_DELTA,
					SlideOutUpAnimationParameters.TO_Y_DELTA);
			slideOutUpAnimation
					.setDuration(SlideOutUpAnimationParameters.DURATION);
		}
		return slideOutUpAnimation;
	}
}
